out of curiosity, would something like this hurt a human? I assume the sound waves must be pretty powerful to put out a fire.
Seems like a standing wave thing to halt airflow rather than "overpower with Bill & Ted's Awesomeness!".
Depending on what they have going, it might be loud, might not.
There's plenty of links in Dublin comments for other instances of the tech being developed at least partially, and at least one for in-home fire suppression. Given that last one, I'm thinking it operates on the basis of resonance rather than amplitude to disrupt combustion.